On the role of global flow instability analysis in closed loop flow control

Sierra Gomez, Francisco and Theofilis, Vassilios and Paredes Gonzalez, Pedro and Liu, Qiong and He, Wei (2012). On the role of global flow instability analysis in closed loop flow control. In: "6th AIAA Flow Control Conference", 25-28 Jun, New Orleans, Louisiana.

Description

Title: On the role of global flow instability analysis in closed loop flow control
Author/s:
  • Sierra Gomez, Francisco
  • Theofilis, Vassilios
  • Paredes Gonzalez, Pedro
  • Liu, Qiong
  • He, Wei
Item Type: Presentation at Congress or Conference (Article)
Event Title: 6th AIAA Flow Control Conference
Event Dates: 25-28 Jun
Event Location: New Orleans, Louisiana
Title of Book: Flow Control Conference, Fluid Dynamics and Co-located Conferences
Date: 2012
Subjects:
Faculty: E.U.I.T. Aeronáutica (UPM)
Department: Física y Química Aplicada a la Técnica Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (3MB) | Preview

Abstract

Control of linear flow instabilities has been demonstrated to be an effective theoretical flow control methodology, capable of modifying transitional flows on canonical geometries such as the plane channel and the flat-plate boundary layer. Extending the well-developed theoretical flow control techniques to flows over or through complex geometries requires addressing the issue of efficient capturing of the leading members of the global eigenspectrum pertinent to such flows. The present contribution describes state-of-the-art modal global instability analysis methodologies recently developed in our group, based on matrix formation and time-stepping, respectively. The relative performance of these algorithms is assessed on the recovery of BiGlobal and TriGlobal eigenspectra in the spanwise periodic and the cubic lid-driven cavity, respectively; the adjoint eigenspectrum in the latter flow is recovered for the first time. For three-dimensional flows without any homogeneous spatial direction, the time-stepping methodology was found to outperform the matrix-forming approach and permit recovering the leading TriGlobal eigenmodes in an three-dimensional open cavity of aspect ratio L : D : W = 5 : 1 : 1; theoretical flow control of this configuration is underway.

More information

Item ID: 36590
DC Identifier: http://oa.upm.es/36590/
OAI Identifier: oai:oa.upm.es:36590
Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2012-2679
Deposited by: Memoria Investigacion
Deposited on: 29 Jan 2016 11:11
Last Modified: 29 Jan 2016 11:11
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM